# 640:250 - Introduction to Linear Algebra

### Resources:

Web sites:
Section web site `http://sites.math.rutgers.edu/~asbuch/linalg_f17/`
General web site for 640:250
Homework and exam scores (Sakai)

Text:
Spence, Insel, and Friedberg, Elementary Linear Algebra (2nd ed.)

Syllabus:
syllabus.pdf

Lectures:
Monday and Thursday 10:20 - 11:40 AM in TIL-258 (Livingston)

Office hours:
Tuesday 11-12 noon and Wednesday 11-12 noon in HILL-234 (Busch)

TA at Large:
George Hauser

Midterm 1, Monday October 2 in class, 22%
Midterm 2, Monday November 6 in class, 22%
Final Exam, Tuesday December 19, 2017: 12:00 PM - 3:00 PM, 44%
Weekly Homework, 12% total.

### Midterm 1:

Monday October 2 in class.
Closed-book exam, no calculators, no formula sheet.
Covered sections: 1.1, 1.2, 1.3, 1.4, 1.6, 1.7, 2.1
Review problems with brief solutions.
Extra office hours: Friday September 29 at 2PM in HILL-423 (Busch)
Average 54/90, Median 52/90, Max 90/90.
F < 38 ≤ D < 45 ≤ C < 60 ≤ B < 75 ≤ A ≤ 90.

### Midterm 2:

Monday November 6 in class.
Closed-book exam, no calculators, no formula sheet.
Covered sections: All sections from chapters 1-4 listed in the syllabus, with main focus on sections 2.3-4.3.
Review problems with brief solutions.
No extra office hours, sorry, I'm about to fly to China.
Review session by George Hauser: Friday November 3, 5:00-6:00 PM in SEC 117.
Average 74/100, Median 78/100, Max 100/100.
F < 47 ≤ D < 60 ≤ C < 75 ≤ B < 90 ≤ A ≤ 100.

### Final Exam:

Tuesday December 19, 2017, 12:00 PM - 3:00 PM in TIL-258
Closed-book exam, no calculators, no formula sheet.
Covered sections: All sections listed in the syllabus.
Review problems with brief solutions.
Average 141/200, Median 146/200, Max 200/200.

### Homework Policy:

(1) Late homework is not accepted.

(2) It is fine to discuss the problems with others, but writeups must be individual. If you have received help for solving a problem, then cite your source(s).

(3) Consider a homework problem as an essay. Explain what you do (without making your explanation longer than necessary). Write neatly. It is your responsibility that whoever reads your work will understand and enjoy it!

(4) For true/false problems: If you believe that a problem is true, then explain why in your own words. If you believe that a problem is false, then provide a counterexample.

Assigned homework sets will show up on this course web site.

### Assigned homework:

Homework 1: Due Thursday September 21 in class.
1.1: 3, 19, 38, 43, 46, 51
1.2: 3, 19, 35, 46, 53, 56, 59
1.3: 3, 23, 51, 58, 59, 66, 71, 74
Homework 2: Due Thursday September 28 in class.
1.4: 11, 17, 35, 54, 58, 63, 65, 67
1.6: 1, 19, 25, 43, 49, 51, 53, 60, 64
1.7: 13, 23, 33, 41, 64, 67, 72, 76, 81
Homework 3: Due Thursday October 5 in class.
1.7: 53, 57
2.1: 7, 13, 15, 17, 19, 22, 27, 29, 35, 38, 41, 44, 47, 49
Homework 4: Due Thursday October 12 in class.
2.3: 3, 11, 17, 19, 25, 29, 36, 38, 41, 45, 46, 52
Homework 5: Due Thursday October 19 in class.
2.4: 1, 3, 7, 9, 19, 27, 29, 35, 38, 48, 49, 51, 52
2.5: 1, 3, 9
Homework 6: Due Thursday October 26 in class.
2.6: 3, 5, 11, 13, 33, 37, 40
3.1: 1, 11, 15, 21, 27, 29, 31, 37, 43, 48, 49, 54, 55, 56, 59, 61
Homework 7: Due Thursday November 2 in class.
3.2: 5, 7, 11, 17, 21, 27, 33, 39, 40, 41, 42, 43, 46, 48, 52, 55, 56, 59, 63, 67
4.1: 5, 9, 11, 13, 19, 21, 27, 29, 46, 47, 48, 58
Homework 8: Due Thursday November 9 in class.
4.2: 5, 7, 19, 21, 27, 33, 38, 40, 41, 44, 46, 47, 50
4.3: 1, 3, 5, 7, 9, 11, 15, 17, 19, 41, 42, 45, 47, 48, 49, 51, 53, 54, 55, 59
Homework 9: Due Tuesday November 21 in class.
5.1: 1, 9, 17, 23, 41, 44, 46, 57, 58, 59, 60, 63, 66, 72
5.2: 5, 9, 11, 15, 19, 21, 41, 53, 54, 56, 57, 63, 64, 65, 71, 79
5.3: 3, 5, 11, 15, 17, 19, 33, 34, 37, 44, 45, 46, 47, 49, 61, 81
Solutions to proof problems
Homework 10: Due Thursday November 30 in class.
5.1: 63, 66, 72 ; 5.2: 79 ; 5.3: 81
6.1: 7, 13, 15, 17, 25, 29, 33, 37, 43, 49, 51, 53, 64, 65, 70, 71, 74, 75, 76, 95, 97, 98
Homework 11: Due Thursday December 7 in class.
6.2: 7, 13, 21, 43, 44, 50
6.3: 5, 11, 17, 19, 34, 38, 39, 42, 46
6.4: 1, 5, 17, 31